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Eirikite

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Big Photo

Eudidymite-Epididymite locality, Vesle Arøya, Langesundsfjorden, Larvik, Vestfold, Norway
© Tom Engvoldsen

Show Eirikite Photos (11)



Formula:
KNa
 
6
Be
 
2
(Si
 
15
Al
 
3
)O
 
39
F
 
2
System:TrigonalColour:White to colorless
Hardness:6
Member of:Leifite Group
Name:Named after Eirik Raude (950-1003), discoverer of Greenland and father of Leiv (Leif) Eiriksson, after whom leifite is named.


Leifite Group.
The K analogue of leifite and telyushenkoite.

Classification of Eirikite

IMA status:Approved 2007
Nickel-Strunz 10th (pending) edition ID:9.EH.25

9 : SILICATES (Germanates)
E : Phyllosilicates
H : Transitional structures between phyllosilicate and other silicate units
Dana 8th edition ID:76.2.11.3

76 : TECTOSILICATES Al-Si Framework
2 : Al-Si Framework Feldspathoids and related species
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Type Occurrence of Eirikite

Type Locality:Eudidymite-Epididymite locality, Vesle Arøya, Langesundsfjorden, Larvik, Vestfold, Norway
Year of Discovery:1983
Geological Setting of type material:A nepheline-syenite pegmatite

Physical Properties of Eirikite

Lustre:Silky
Colour:White to colorless
Streak:White
Hardness (Mohs):6
Tenacity:Brittle
Cleavage:Distinct/Good
on {100}
Fracture:Irregular/Uneven, Conchoidal
Density (measured):2.59 g/cm3

Crystallography of Eirikite

Crystal System:Trigonal
Class (H-M):3m (3 2/m) - Hexagonal Scalenohedral
Space Group:P3m1 {P3 2/m 1}
Cell Parameters:a = 14.3865Å, c = 4.8733Å
Ratio:a:c = 1 : 0.339
Unit Cell Volume:V 873.50 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
4.710 (29)
4.153 (21)
3.386 (70)
3.161 (100)
3.115 (17)
2.466 (31)
2.398 (19)
2.217 (20)

Chemical Properties of Eirikite

Formula:
KNa
 
6
Be
 
2
(Si
 
15
Al
 
3
)O
 
39
F
 
2
Essential elements:Al, Be, F, K, Na, O, Si
All elements listed in formula:Al, Be, F, K, Na, O, Si

Relationship of Eirikite to other Species

Member of:Leifite Group
Other Members of Group:

- +
Leifite
(Na,H
 
2
O)Na
 
6
[Be
 
2
Al
 
2
(Al,Si)Si
 
15
O
 
39
]F
 
2
Telyushenkoite
(Cs,Na,K)Na
 
6
[F
 
2
|Be
 
2
Al
 
3
Si
 
15
O
 
39
]
Related Minerals - Nickel-Strunz Grouping):

- +
9.EH.05Manganoneptunite
Na
 
2
KLi(Mn
2+
 
,Fe
2+
 
)
 
2
Ti
 
2
[Si
 
8
O
 
24
]
9.EH.05Neptunite
Na
 
2
KLi(Fe
2+
 
,Mn
2+
 
)
 
2
Ti
 
2
(Si
 
8
O
 
24
)
9.EH.05Watatsumiite
Na
 
2
KLi(Mn
2+
 
,Fe
2+
 
)
 
2
V
4+
2
[Si
 
8
O
 
24
]
9.EH.05Magnesioneptunite
KNa
 
2
Li(Mg,Fe)
 
2
Ti
 
2
Si
 
8
O
 
24
9.EH.10Grumantite
Na(HSi
 
2
O
 
5
) · H
 
2
O
9.EH.15Sarcolite
Na
 
2
Ca
 
12
(Ca,K,Fe,Sr,Mg)
 
2
Al
 
8
Si
 
12
(P,Si)O
 
52
F
 
2
9.EH.20Ussingite
Na
 
2
AlSi
 
3
O
 
8
OH
9.EH.25Leifite
(Na,H
 
2
O)Na
 
6
[Be
 
2
Al
 
2
(Al,Si)Si
 
15
O
 
39
]F
 
2
9.EH.25Telyushenkoite
(Cs,Na,K)Na
 
6
[F
 
2
|Be
 
2
Al
 
3
Si
 
15
O
 
39
]
9.EH.30Nafertisite
Na
 
3
(Fe
2+
 
,Fe
3+
 
)
 
6
(Ti
 
2
Si
 
12
O
 
34
)(O,OH)
 
7
 · 2H
 
2
O

Other Names for Eirikite

Synonyms:
IMA2007-017
Other Languages:

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Eirikite

Reference List:

- +
Larsen, A.O., Kolitsch, U., Gault, R.A., Giester, G. (2010): Eirikite, a new mineral species of the leifite group from the Langesundsfjord district, Norway. European Journal of Mineralogy, 22, 875-880.

Armstrong, J.A., Friis, H., Lieb, A., Finch, A.A., Weller, M.T. (2010): Combined single-crystal X-ray and neutron powder diffraction structure analysis exemplified through full structure determinations of framework and layer beryllate minerals. American Mineralogist, 95, 519-526. [refinement of Na-bearing leifite]

Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 pp [p 112-113]

HORVÁTH, L. (2009) Bertrandite, eirikite and a review of beryllium minerals from Mont Saint-Hilaire. MICRONEWS, 43(5), 9-12.

Internet Links for Eirikite

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    • Localities for Eirikite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Canada
     
    • Québec
      • Montérégie
        • Rouville RCM
    		LARSEN, A.O., KOLITSCH, U., GAULT, R.A. and GIESTER,G. (2010) Eirikite, a new mineral species of the leifite group from the Langesundsfjord district, Norway. European Journal of Mineralogy, 22, 875-880. Can. Museum of Nature & Horváth collections;
    HORVÁTH, L. (2009) Bertrandite, eirikite and a review of beryllium minerals from Mont Saint-Hilaire. MICRONEWS, 43(5), 9-12.
    Norway
     
    • Vestfold
      • Larvik
        • Langesundsfjorden
          • Vesle Arøya
    		Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 p: Larsen, A.O., Kolitsch, U., Gault, R.A. & Giester, G. (2010): Eirikite a new mineral species of the leifite group from the Langesundsfjord district, Norway. European Journal of Mineralogy. 22, 875–880
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Lovozero Massif
            • Alluaiv Mt
              • Umbozero mine (Umba mine)
    		Pavel M. Kartashov data
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